‘Now children, you cannot make eye contact with Babs. You know that she does not like that. Do not look at her while you’re here’

Barbra Streisand’s diva ways apparently extend from her performances to her palace.

Sources tell Confidenti@l the Grammy Award-winner made ridiculous and patronizing demands on interior decorators who recently worked on her $100 million Malibu mansion.

We have learned “The Send in the Clowns” singer allegedly behaved like one by constantly squabbling with workers over prices, refusing to eat while decorators were in her house, and barring workers from even looking at her.

“They were told by a friend of hers, ‘Now children, you cannot make eye contact with Babs. You know that she does not like that. Do not look at her while you’re here,’ ” reveals our source.

The design pros supposedly were outraged at being spoken to like schoolchildren and considered walking off the job. Our snitch says Streisand – who Confidenti@l reported earlier this month collected a cool $2.3 million for singing just 10 tunes at a banking conference — haggled over prices as if she were at a flea market.

“It was a chore to deal with her whining, and it’s not worth the time and effort because she’s so stingy,” claims our source. “Barbra is extremely persnickety about every small detail and pattern, and she’s a huge know-it-all to boot. She sees herself as an extraordinary design aficionado.”

Andy why are these lefties so greedy?

“Barbra is all agony and no ecstasy,” says our source. “She goes through each and every swatch and then loves to penny-pinch. Meanwhile, she has more money than God.”